Plug Top 13A Fuse

[Johntheo5]

Reading a fair amount lately re these EV granny charging cable plugtops/sockets etc going on fire and wondered how much heat is generated in the fuse itself, not a lot if my tests are to be believed, tests were done on a DC circuit with a battery so maybe more heat generated under AC conditions?.

My M.meter measured 10A (DC) through a mini air compressor and a fuse volt drop (measured between the fuse caps) of 0.046VDC on the 0-2V scale and 50 on the 0-200k scale so I assume 0.05VDC drop through the 13A fuse with a 10A load, this equates to a fuse resistance of only, 0.05/10, 0.005 ohms and a heat loss of 0.05*10, 0.5 watts?? seems very very low?. Google/AI……state that the resistance of a typical BS1362 13A fuse is 4mOhm.

What is 4mOhms in ohms??

 

[Ragnar_AT]

4 mOhm equals 0.004 Ohms, which is very close to what you found.

 

[FrodoOne]

This is the first time that I have seen the term "granny charging".

I now see that it is associated with "Charging" an Electric Vehicle from a "normal" Socket-Outlet,
whatever that may be in the country concerned.

Of course,
this is all that one would need, for day-to-day travelling in an an Electric Vehicle,
either to and from "work"
or
on shopping expeditions
within a less than 50 km radius!

What is 4mOhms in ohms??

You really do need to understand SI -
the "International System of Units"

(https://en.wikipedia.org/wiki/International_System_of_Units )

 

[Johntheo5]

Thanks Fred,

I certainly know how to use SI units and you now know what "granny charging is"

A "granny charger" is a colloquial term for a portable EV charging cable that plugs into a standard household outlet, also known as a Level 1 or In-Cable Control Box (ICCB) charger. It's called this because it's often used when visiting family, who may not have a dedicated EV charger, for emergency or occasional charging due to its slow speed. While it comes with the vehicle and is portable, it delivers very slow charging speeds and should be used cautiously to avoid overheating sockets or using extension cords.

John

 

[Risteard]

Thanks Fred,

I certainly know how to use SI units and you now know what "granny charging is"

A "granny charger" is a colloquial term for a portable EV charging cable that plugs into a standard household outlet, also known as a Level 1 or In-Cable Control Box (ICCB) charger. It's called this because it's often used when visiting family, who may not have a dedicated EV charger, for emergency or occasional charging due to its slow speed. While it comes with the vehicle and is portable, it delivers very slow charging speeds and should be used cautiously to avoid overheating sockets or using extension cords.

John

It's known as Mode 2. "Level 1" is an American term.